NASA always seems to be up to educating people, even when the rich and famous reach out.

Milo Ventimiglia (“This is Us”) caught wind of Cassini’s epic finale, which is planned for Sept. 17. The spacecraft has been orbiting Saturn for the past 13 years and is due for retirement in the form of a glorious death dive into the planet.

The actor must’ve just learned about the spacecraft thanks to new images released on Monday of the “Hexagon” — or a polar jet stream near the...